/* ================================================================
   BIKKURI LUNCH 2026 — Style Sheet
   Theme: 和栗 / 森 / 和モダン / ネイチャー
   ================================================================ */

/* ----------------------------------------------------------------
   CSS VARIABLES
---------------------------------------------------------------- */
:root {
  /* Colors */
  --color-chestnut-deep: #3e2010;
  --color-chestnut-dark: #5b3a29;
  --color-chestnut: #6b4423;
  --color-chestnut-mid: #8b5e3c;
  --color-chestnut-light: #a67c52;
  --color-chestnut-pale: #c4956a;

  --color-ivory: #f7f2ea;
  --color-ivory-dark: #ede5d8;
  --color-craft: #e8dcc8;
  --color-soil: #d4c4a8;
  --color-warm-white: #faf7f2;

  --color-forest-deep: #1e3020;
  --color-forest: #2d4a2e;
  --color-forest-mid: #3d6140;
  --color-forest-light: #5a8560;
  --color-moss: #7a9e6a;

  --color-text-dark: #2a1810;
  --color-text-brown: #4a2e1a;
  --color-text-mid: #6b4423;
  --color-text-light: #f0e8d8;
  --color-text-ivory: #f7f2ea;

  --color-placeholder-bg: #c8bdb0;
  --color-placeholder-text: #8a7a6e;

  /* Typography */
  --font-serif: "Kaisei Decol", "Hiragino Mincho ProN", serif;
  --font-sans:
    "Cal Sans", "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-latin: "Alegreya", serif;

  /* Spacing */
  --section-pad-v: 72px;
  --section-pad-h: 24px;
  --border-radius: 4px;

  /* Transitions */
  --transition-slow: 0.6s ease;
  --transition-mid: 0.35s ease;
}

/* ----------------------------------------------------------------
   RESET & BASE
---------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  /* background-color: var(--color-ivory); */
  background-color: #fff;
  color: var(--color-text-dark);
  line-height: 1.8;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
}

/* ----------------------------------------------------------------
   PLACEHOLDER BOXES
---------------------------------------------------------------- */
.slide-placeholder,
.media-placeholder,
.card-img-placeholder,
.logo-placeholder,
.logo-box {
  background-color: var(--color-placeholder-bg);
  color: var(--color-placeholder-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-latin);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: var(--border-radius) 0 var(--border-radius)
    var(--border-radius);
  user-select: none;
}

.slide-placeholder {
  width: 100%;
  height: 100%;
  font-size: 1rem;
}

.media-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  font-size: 0.9rem;
}

.media-placeholder.dark {
  background-color: #9a8e82;
  color: #5a504a;
}

.card-img-placeholder {
  width: 100%;
  aspect-ratio: 3 / 2;
  font-size: 0.7rem;
}

.logo-placeholder {
  width: 150px;
  height: auto;
  padding: 0.5rem;
  background-color: #fff;
}

.logo-placeholder.small {
  width: 60px;
  height: 30px;
  font-size: 0.6rem;
}

/* ----------------------------------------------------------------
   UTILITY
---------------------------------------------------------------- */
.section-inner {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--section-pad-v) var(--section-pad-h);
}

.section-inner-wide {
  max-width: 100%;
  padding: var(--section-pad-v) 0;
}

.section-label {
  font-family: var(--font-serif);
  /* font-size: 0.75rem; */
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-chestnut-light);
  margin-bottom: 8px;
}

.section-label.light {
  color: var(--color-chestnut-pale);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--color-text-brown);
  line-height: 1.4;
  margin-bottom: 36px;
  letter-spacing: 0.05em;
}

.section-title.light {
  color: var(--color-text-ivory);
}

.section-desc {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-text-mid);
  margin-bottom: 32px;
  letter-spacing: 0.03em;
}

.lead-text {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.9;
  color: var(--color-text-brown);
  margin-bottom: 20px;
}

.lead-text.light {
  color: var(--color-text-ivory);
}

.body-text {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  line-height: 1.95;
  color: var(--color-text-dark);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.body-text.light {
  color: rgba(247, 242, 234, 0.88);
}

.mq-mob {
  display: block;
}
.mq-dpc {
  display: none;
}

.f-ivory {
  color: var(--color-ivory);
}

@media screen and (min-width: 768px) {
  .mq-mob {
    display: none;
  }
  .mq-dpc {
    display: block;
  }
}

/* ----------------------------------------------------------------
   FADE-IN ANIMATION
---------------------------------------------------------------- */
.fade-in-section {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.fade-in-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ----------------------------------------------------------------
   HEADER
---------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition:
    background var(--transition-mid),
    box-shadow var(--transition-mid);
}

.site-header.scrolled {
  /* background: rgba(59, 32, 16, 0.92); */
  background: rgba(129, 66, 0, 1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(129, 66, 0, 0);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ロゴをセンター配置するためのスペーサー（ハンバーガーと同幅） */
.header-spacer {
  width: 36px;
  flex-shrink: 0;
}

.header-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}

/* ハンバーガー */
.nav-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(233, 85, 4, 1);
  border: 1px solid rgba(247, 242, 234, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px;
  transition: background var(--transition-mid);
}

.nav-icon:hover {
  /* background: rgba(247, 242, 234, 0.25); */
  background: rgba(248, 182, 0, 1);
}

.nav-icon span {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--color-text-ivory);
  transition:
    transform var(--transition-mid),
    opacity var(--transition-mid);
  transform-origin: center;
}

.nav-icon.open span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.nav-icon.open span:nth-child(2) {
  opacity: 0;
}
.nav-icon.open span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ナビメニュー */
.nav-menu {
  background: rgba(42, 24, 16, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.nav-menu.open {
  max-height: 400px;
}

.nav-menu ul {
  padding: 12px 0 20px;
}

.nav-menu li a {
  display: block;
  padding: 12px 24px;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--color-text-light);
  letter-spacing: 0.08em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition:
    color var(--transition-mid),
    padding-left var(--transition-mid);
}

.nav-menu li a:hover {
  color: var(--color-chestnut-pale);
  padding-left: 32px;
}

/* ----------------------------------------------------------------
   HERO SECTION
---------------------------------------------------------------- */
.section-hero {
  background: rgba(129, 66, 0, 0.1);
  position: relative;
  width: 100%;
  height: 100svh;
  min-height: 580px;
  overflow: hidden;
}

.hero-image {
  width: 100%;
  height: 100%;
}

.hero-image.mq-mob img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-image.mq-dpc img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.hero-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.slide.active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(30, 15, 5, 0.35) 0%,
    rgba(30, 15, 5, 0.1) 40%,
    rgba(30, 15, 5, 0.5) 75%,
    rgba(20, 10, 3, 0.75) 100%
  );
  z-index: 1;
}

.hero-text {
  position: absolute;
  bottom: 100px;
  left: 24px;
  right: 24px;
  z-index: 2;
  text-align: left;
}

.hero-event-label {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--color-chestnut-pale);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-latin);
  font-size: clamp(2.2rem, 10vw, 3.5rem);
  font-weight: 300;
  color: var(--color-text-ivory);
  line-height: 1.15;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.hero-title .year {
  font-size: 0.6em;
  letter-spacing: 0.2em;
  opacity: 0.8;
}

.hero-catch {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 4.5vw, 1.5rem);
  font-weight: 400;
  color: var(--color-text-ivory);
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin-bottom: 10px;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.4);
}

.hero-sub {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: rgba(247, 242, 234, 0.78);
  letter-spacing: 0.05em;
  line-height: 1.7;
}

/* スライダーボタン */
.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 36px;
  height: 36px;
  background: rgba(247, 242, 234, 0.15);
  border: 1px solid rgba(247, 242, 234, 0.3);
  border-radius: 50%;
  color: var(--color-text-ivory);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-mid);
}

.slider-btn:hover {
  background: rgba(247, 242, 234, 0.28);
}

.slider-prev {
  left: 14px;
}
.slider-next {
  right: 14px;
}

/* インジケーター */
.slider-indicators {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 8px;
}

.indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(247, 242, 234, 0.35);
  border: 1px solid rgba(247, 242, 234, 0.5);
  transition:
    background var(--transition-mid),
    transform var(--transition-mid);
}

.indicator.active {
  background: var(--color-text-ivory);
  transform: scale(1.2);
}

/* ----------------------------------------------------------------
   ABOUT SECTION
---------------------------------------------------------------- */
.section-about {
  /* background: var(--color-ivory); */
  background-color: #fff;
  position: relative;
}

/* .section-about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    to right,
    var(--color-chestnut-deep),
    var(--color-chestnut-light),
    transparent
  );
} */

.leaf-deco {
  font-size: 0.6rem;
  color: var(--color-forest-light);
  letter-spacing: 0.5em;
  margin-bottom: 8px;
  opacity: 0.6;
}

.about-media {
  margin-bottom: 32px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(91, 58, 41, 0.15);
}

.about-text {
  padding-top: 4px;
}

/* ----------------------------------------------------------------
   DATE / COUNTDOWN SECTION
---------------------------------------------------------------- */
.date-media {
  margin-bottom: 32px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(91, 58, 41, 0.15);
}

.section-date {
  background-color: rgba(129, 66, 0, 1);
  /* background-image: url(../img/bg-count.jpg);
  background-size: cover;
  background-position: center; */
  /* background: linear-gradient(
    160deg,
    var(--color-chestnut-deep) 0%,
    var(--color-forest-deep) 100%
  ); */
  position: relative;
  overflow: hidden;
}

.date-bg-deco {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(
      circle at 80% 20%,
      rgba(107, 68, 35, 0.3) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 20% 80%,
      rgba(45, 74, 46, 0.3) 0%,
      transparent 50%
    );
  pointer-events: none;
}

/* ヘッダー部：Schedule + 年号（重ね合わせ演出） */
.date-header {
  text-align: center;
  margin-bottom: 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.date-eyebrow {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-chestnut-pale);
  /* color: var(--color-ivory); */
  position: relative;
  z-index: 1;
  order: 2; /* 年号の後ろに配置順 */
  margin-top: -2rem; /* 年号テキストに被せる */
}

.date-year {
  font-family: var(--font-latin);
  font-size: clamp(5rem, 26vw, 8rem);
  font-weight: 300;
  color: var(--color-text-ivory);
  line-height: 1;
  letter-spacing: 0.06em;
  opacity: 0.1;
  user-select: none;
  pointer-events: none;
  order: 1;
}

/* 日付表示エリア: ボックスなし */
.event-date-display {
  text-align: center;
  margin-bottom: 52px;
  position: relative;
}

/* 数字大きメイン表示 */
.date-range-line {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.date-month {
  font-family: var(--font-latin);
  font-size: clamp(2.4rem, 13vw, 3.8rem);
  font-weight: 300;
  color: var(--color-text-ivory);
  /* color: var(--color-text-ivory); */
  line-height: 1;
  letter-spacing: 0.02em;
}

.date-slash {
  font-family: var(--font-latin);
  font-size: clamp(1.4rem, 7vw, 2rem);
  font-weight: 300;
  color: var(--color-chestnut-pale);
  /* color: var(--color-chestnut-pale); */
  line-height: 1;
  opacity: 0.6;
  margin: 0 1px;
}

.date-day {
  font-family: var(--font-latin);
  font-size: clamp(2.4rem, 13vw, 3.8rem);
  font-weight: 300;
  color: var(--color-text-ivory);
  /* color: var(--color-text-ivory); */
  line-height: 1;
  letter-spacing: 0.02em;
}

.date-dow {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-chestnut-pale);
  /* color: var(--color-chestnut-pale); */
  text-transform: uppercase;
  padding-left: 3px;
  align-self: flex-end;
  padding-bottom: 4px;
}

.date-wave {
  font-family: var(--font-latin);
  font-size: clamp(1rem, 5vw, 1.4rem);
  color: var(--color-chestnut-pale);
  opacity: 0.5;
  margin: 0 8px;
  align-self: center;
  letter-spacing: 0;
}

/* 日本語記述（小さめを追記） */
.date-kanji {
  font-family: var(--font-serif);
  font-size: 0.78rem;
  color: rgba(247, 242, 234, 0.5);
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.date-sub {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  color: var(--color-chestnut-pale);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  opacity: 0.6;
}

.countdown-wrap {
  text-align: center;
}

.countdown-label {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--color-text-light);
  letter-spacing: 0.12em;
  margin-bottom: 20px;
  opacity: 0.85;
}

.countdown-timer {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.countdown-num {
  font-family: var(--font-latin);
  font-size: clamp(2rem, 11vw, 3rem);
  font-weight: 300;
  color: var(--color-text-ivory);
  line-height: 1;
  /* ボックス感なし、下線のみ */
  padding: 4px 6px 10px;
  min-width: 54px;
  text-align: center;
  letter-spacing: 0.05em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(196, 149, 106, 0.35);
}

.countdown-unit-label {
  font-family: var(--font-serif);
  font-size: 0.7rem;
  color: var(--color-chestnut-pale);
  letter-spacing: 0.15em;
}

.countdown-sep {
  font-family: var(--font-latin);
  font-size: 2rem;
  color: var(--color-chestnut-pale);
  line-height: 1;
  padding-top: 10px;
  opacity: 0.6;
}

/* ----------------------------------------------------------------
   CONTENTS CARDS SECTION
---------------------------------------------------------------- */
.section-contents {
  background-color: #fff;
  /* background: var(--color-craft); */
  position: relative;
}

.section-contents .section-label,
.section-contents .section-title,
.section-contents .section-desc {
  padding-left: var(--section-pad-h);
}

.cards-container {
  position: relative;
  display: flex;
  align-items: center;
}

.cards-wrapper {
  display: flex;
  gap: 0;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0 24px;
  scrollbar-width: none;
  flex: 1;
}

.cards-wrapper::-webkit-scrollbar {
  display: none;
}

/* スマホ: 1枚ぴったり表示 */
.content-card {
  flex: 0 0 calc(100vw - 72px); /* 左右の矢印ボタン分を除いた幅 */
  width: calc(100vw - 72px);
  scroll-snap-align: center;
  background: var(--color-ivory);
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(91, 58, 41, 0.12);
  transition:
    transform var(--transition-mid),
    box-shadow var(--transition-mid);
  border: 1px solid var(--color-soil);
  margin: 0 8px;
}

.content-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(91, 58, 41, 0.2);
}

/* カード画像を大きく */
.card-img-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  font-size: 0.9rem;
}

.card-body {
  padding: 18px 20px 22px;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-brown);
  margin-bottom: 10px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.card-desc {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: #6a5040;
  line-height: 1.75;
}

.card-nav {
  position: relative;
  z-index: 2;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-chestnut);
  color: var(--color-text-ivory);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition:
    background var(--transition-mid),
    transform var(--transition-mid);
  flex-shrink: 0;
  margin: 0 4px;
  align-self: center;
}

.card-nav:hover {
  background: var(--color-chestnut-dark);
  transform: scale(1.05);
}

.card-prev {
  order: -1;
}
.card-next {
  order: 1;
}

.cards-indicator {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 0 24px 8px;
}

.cards-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-soil);
  transition:
    background var(--transition-mid),
    transform var(--transition-mid);
  border: none;
  cursor: pointer;
}

.cards-dot.active {
  background: var(--color-chestnut);
  transform: scale(1.3);
}

/* ----------------------------------------------------------------
   MISSION SECTION
---------------------------------------------------------------- */
.section-mission {
  background-color: rgba(0, 144, 61, 1);
  /* background: linear-gradient(
    170deg,
    var(--color-forest-deep) 0%,
    #0e1e10 100%
  ); */
  position: relative;
  overflow: hidden;
}

.section-mission::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 50% 30%,
    rgba(61, 97, 64, 0.25) 0%,
    transparent 60%
  );
  pointer-events: none;
}

.mission-media {
  margin-bottom: 32px;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.mission-text {
  padding-bottom: 32px;
}

.sns-section {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid rgba(247, 242, 234, 0.24);
}

.sns-label {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: #fff;
  /* color: var(--color-chestnut-pale); */
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}

.sns-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.sns-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  transition:
    opacity var(--transition-mid),
    transform var(--transition-mid);
}

.sns-btn:hover {
  opacity: 0.82;
  transform: translateY(-2px);
}

.sns-btn svg {
  width: 18px;
  height: 18px;
}

.sns-instagram {
  background: linear-gradient(45deg, #833ab4, #fd1d1d, #fcb045);
  color: white;
}

/* .sns-x は使用しないため削除 */

/* ----------------------------------------------------------------
   SPONSOR SECTION
---------------------------------------------------------------- */
.section-sponsor {
  background: var(--color-ivory-dark);
}

/* スポンサーグリッド: ロゴ幅を約180px基準に自動列数 */
.sponsor-grid-main {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
}

.logo-box {
  aspect-ratio: 2 / 1;
  background: var(--color-placeholder-bg);
  color: var(--color-placeholder-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-latin);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  border: 1px solid var(--color-soil);
  border-radius: var(--border-radius);
  transition:
    border-color var(--transition-mid),
    box-shadow var(--transition-mid);
  min-height: 64px;
}

.logo-box:hover {
  border-color: var(--color-chestnut-light);
  box-shadow: 0 2px 10px rgba(91, 58, 41, 0.1);
}

.sponsor-cta {
  text-align: center;
  margin-top: 36px;
}

/* ----------------------------------------------------------------
   COUNCIL SECTION
---------------------------------------------------------------- */
.section-council {
  background: linear-gradient(
    170deg,
    var(--color-chestnut-deep) 0%,
    #2e1a08 100%
  );
  position: relative;
  overflow: hidden;
}

.section-council::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 30% 60%,
    rgba(107, 68, 35, 0.25) 0%,
    transparent 55%
  );
  pointer-events: none;
}

.council-media {
  margin-bottom: 32px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.council-text {
  padding-bottom: 32px;
}

.council-cta {
  text-align: center;
  padding-top: 8px;
}

/* ----------------------------------------------------------------
   BUTTONS
---------------------------------------------------------------- */
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--color-chestnut);
  color: var(--color-text-ivory);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-chestnut-light);
  transition:
    background var(--transition-mid),
    transform var(--transition-mid),
    box-shadow var(--transition-mid);
}

.btn-primary:hover {
  background: var(--color-chestnut-mid);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(91, 58, 41, 0.35);
}

.btn-outline {
  display: inline-block;
  padding: 12px 32px;
  background: transparent;
  color: var(--color-chestnut);
  font-family: var(--font-serif);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-chestnut);
  transition:
    background var(--transition-mid),
    color var(--transition-mid),
    transform var(--transition-mid);
}

.btn-outline:hover {
  background: var(--color-chestnut);
  color: var(--color-text-ivory);
  transform: translateY(-2px);
}

/* ----------------------------------------------------------------
   FOOTER
---------------------------------------------------------------- */
.site-footer {
  background-color: rgba(129, 66, 0, 1);
  /* background: var(--color-chestnut-deep); */
  padding: 48px 24px 32px;
}

.footer-inner {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.footer-logo-text {
  font-family: var(--font-latin);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--color-chestnut-pale);
  text-transform: uppercase;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  justify-content: center;
}

.footer-nav li a {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: rgba(240, 232, 216, 0.65);
  letter-spacing: 0.04em;
  transition: color var(--transition-mid);
}

.footer-nav li a:hover {
  color: var(--color-text-light);
}

.footer-sns {
  display: flex;
  gap: 16px;
}

.footer-sns a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(247, 242, 234, 0.08);
  border: 1px solid rgba(247, 242, 234, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--transition-mid),
    transform var(--transition-mid);
}

.footer-sns a:hover {
  background: rgba(247, 242, 234, 0.18);
  transform: translateY(-2px);
}

.footer-sns svg {
  width: 16px;
  height: 16px;
  color: rgba(240, 232, 216, 0.75);
}

.footer-copy {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: rgba(240, 232, 216, 0.4);
  letter-spacing: 0.06em;
  text-align: center;
}

/* ----------------------------------------------------------------
   SECTION DIVIDERS (subtle texture lines)
---------------------------------------------------------------- */
.section-about,
.section-sponsor {
  border-top: 1px solid var(--color-soil);
}

/* ----------------------------------------------------------------
   SCROLLBAR (webkit)
---------------------------------------------------------------- */
::-webkit-scrollbar {
  width: 4px;
}

::-webkit-scrollbar-track {
  background: var(--color-ivory-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--color-chestnut-light);
  border-radius: 2px;
}

/* ----------------------------------------------------------------
   MEDIA QUERIES — desktop補完
---------------------------------------------------------------- */
@media (min-width: 600px) {
  .section-inner {
    padding: 88px 32px;
  }

  .hero-text {
    left: 40px;
    right: 40px;
    bottom: 120px;
  }

  .hero-catch {
    font-size: 1.6rem;
  }

  .countdown-num {
    min-width: 72px;
    padding: 12px 16px;
  }
}

@media (min-width: 768px) {
  /* タブレット以上はカードを複数枚表示 */
  .content-card {
    flex: 0 0 320px;
    width: 320px;
    margin: 0 8px;
  }

  /* タブレット以上はsponsor-grid-mainをsection-inner幅に従わせる（上書き不要） */
}

@media (prefers-reduced-motion: reduce) {
  .fade-in-section {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .slide {
    transition: none;
  }
}